I made this tube grinding jig to help me shorten a few 20mm Alu tubes to the correct lenght, using a 'Dremel' with a grinding disk. The motor used is 12V 50RPM. Bearings: 19mm x 6mm x 6mm. Screws: 3x M3-8mm, 6x M3-20mm(or more), 2 or 3 M3 nuts, 1 washer, 8x wood/plastic screws 3mm x 12mm. ** Tips and support kindly accepted here: https://paypal.me/ZigaM3 Or with LBRY (LBC) credits, through my Odysee channel: https://odysee.com/@ZigaMDIY:9 I also design on redbubble: https://www.redbubble.com/people/reintegration/shop And I promote my RB designs on Pinterest: https://www.pinterest.com/reIntegration42